农业环境科学学报2025，Vol.44Issue(12)：3138-3149,封2,13.DOI:10.11654/jaes.2024-1156
秸秆及其炭化还田对北方稻田土壤团聚体形成及其固碳、供养能力的促进作用与机制
Effects and mechanisms of straw and its carbonization incorporation on paddy soil aggregate formation,carbon sequestration and nutrient supply capacity in northeast China
摘要
Abstract
To investigate the impacts of straw incorporation and its carbonization on paddy soil aggregate formation,stability,carbon sequestration,and nutrient-supplying capacity in northeast China,we established a long-term field experiment comparing chemical fertilizer(CF),rice straw(RS),rice straw biochar(RB),and biochar-based fertilizer(BF)treatments.We examined aggregate distribution and stability,nutrient content,organic carbon fractions,and carbon conversion-related enzyme activities.The results revealed that straw incorporation and its carbonization significantly enhanced macroaggregate formation,with RB,RS,and BF treatments increasing macroaggregates by 40.83％,37.78％,and 24.97％,respectively,compared to CF,while substantially improving aggregate stability.Notably,the intensity of—OH,—CH3,and C—O—C absorption peaks in macroaggregates increased,facilitating macroaggregate formation and stabilization.Meanwhile,the treatments enhanced soil organic carbon(SOC)content and altered its fractions,synergistically increasing both soil reactive organic carbon(particulate organic carbon(POC),light fraction organic carbon(LFOC))and inert organic carbon(mineral-associated carbon(MAOC),heavy fraction organic carbon(HFOC)).RS treatment exhibited significant enhancement of POC,whereas RB demonstrated superior performance in elevating LFOC,HFOC,and MAOC compared to other treatments.Additionally,Synergistic enhancement of β-1,4-glucanase(S-C1),polyphenol oxidase(S-PPO)and peroxidase(S-POD)by RB,S-C1 and S-POD by BF,and S-PPO by RS in soil and macroaggregates,facilitating soil carbon sequestration and transformation.The treatments also demonstrated positive effects on nitrogen,phosphorus,and potassium content,with macroaggregates serving as primary nutrient repositories.Further analysis showed that LFOC and S-PPO emerged as primary factors influencing soil aggregate size distribution,while treatment differences were predominantly driven by SOC,HFOC,S-PPO,S-C1,and total potassium(TK).MAOC and HFOC could directly drive soil macroaggregate formation.Whereas,soil nutrients,soil enzymes,and different carbon fractions could improve soil aggregate stability through direct and indirect pathways.Research indicates that straw and its carbonization incorporation can enhance soil carbon sequestration and nutrient supply capacities in northern paddy soils by regulating soil nutrients,SOC and its fractions,and carbon transformation-related enzyme activities.This promotes macroaggregate formation and improves aggregate stability.关键词
秸秆还田/生物炭/土壤团聚体/有机碳组分/土壤肥力Key words
straw incorporation/biochar/soil aggregates/organic carbon fractions/soil fertility分类
农业科技引用本文复制引用
顾闻琦,孙媛媛,吴迪,孙雯,王欣,刘子凡,王文佳,张伟明,陈温福..秸秆及其炭化还田对北方稻田土壤团聚体形成及其固碳、供养能力的促进作用与机制[J].农业环境科学学报,2025,44(12):3138-3149,封2,13.基金项目
黑土地保护与利用科技创新工程专项(XDA28090300) （XDA28090300）
国家重点研发计划项目(2023YFD1501200) （2023YFD1501200）
稻田生物炭基培肥产品的研制与施用技术项目(2016YFD0300904-4) （2016YFD0300904-4）
院士专项基金项目Strategic Priority Research Program of the Chinese Academy of Sciences(XDA28090300) （XDA28090300）
National Key Research and Development Program of China(2023YFD1501200) （2023YFD1501200）
Biochar-based Fertilizer Development and Application Technology for Soil Fertility Improvement in Rice(2016YFD0300904-4) （2016YFD0300904-4）
Special Fund for Academicians （）
